. Bulletins of American paleontology. 63 Marine Shells S. W. Fla. : Perry 63 ed. rostrate and extended at posterior end. White with fine zig- zag markings of pale brown, often purple at posterior end; thin periostracum. Lunule well defined, escutcheon obscure. Three cardinal teeth in each valve, middle right tooth bifid ; one left posterior lateral tooth with opposite socket in right valve. In- terior polished, white, washed with yellow or pink, purple at posterior end. Pallia! sinus oblique with rounded Fig. 2. Diagram showing the characteristic features of Transenella Characteris


. Bulletins of American paleontology. 63 Marine Shells S. W. Fla. : Perry 63 ed. rostrate and extended at posterior end. White with fine zig- zag markings of pale brown, often purple at posterior end; thin periostracum. Lunule well defined, escutcheon obscure. Three cardinal teeth in each valve, middle right tooth bifid ; one left posterior lateral tooth with opposite socket in right valve. In- terior polished, white, washed with yellow or pink, purple at posterior end. Pallia! sinus oblique with rounded Fig. 2. Diagram showing the characteristic features of Transenella Characteristic of the genus Transenella is a series of grooves on inner aspect of the slightly bevelled valve margins. These grooves cut diagonally across the line of growth and may be best observed with magnifying lens. Transenella cubaniana Plate 13, fig. 79 Alt., ; length, 11 ; diam., mm. Shell pure white, rarely flecked with brown; trigonal, less rostrate than T. conradina. .Sculpture of fine impressed, concentric lines. Inner margin obliquely engraved. Transenella stimpsoni Dall Plate 13, fig. 79A Alt., ; length, 13 ; 6 mm. Shell small, trigonal, round- ed, moderate posterior rostration; milky white or bluish color with brown streaks and chevron markings. Umbos prominent, a little anterior ot middle; smooth, oval lunule defined by an in-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]


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